Function implementation around ProcessorModule.process(PageInfo, Hashtable, Hashtable). See in
MMAdmin for an example on how to use. It does not support multipible commands, so the first
Hashtable always contains precisely one entry. The value of the entry is the value of the
first string parameter or the empty string. All parameters are added to the second Hashtable
parameter ('vars'), and this is also returned (because sometimes also results are put in it).